vii 



PAOK 



The Morphology of the Trypanosome Causing Disease in Man in Nyasaland. By 

 Colonel Sir David Bruce, C.B., F.R.S., A.M.S. ; Majors David Harvey and 

 A. E. Hamerton, D.S.O., R.A.M.C. ; Dr. J. B. Davey, Nyasaland Medical 



Staff ; and Lady Bruce, R.B.C. (Scientific Commission of the Royal Society, 

 Nyasaland, 1911—12.) (Plates 11 and 12) 423 



Negative After-Images and Successive Contrast with Pure Spectral Colours. By 

 A. W. Porter, B.Sc, F.R.S., Fellow of University of London, University 

 College, and F. W. Edridge-Green, M.D., F.R.C.S., Beit Memorial Research 

 Fellow 434 



The Relation between Capillary Pressure and Secretion. II. — The Secretion of the 

 Aqueous and the Intraocular Pressure. By Leonard Hill, F.R.S., and Martin 

 Flack (Eliza Ann Alston Research Scholar) 439 



The Oxydases of Cytisus Adami. By Frederick Keeble, Sc.D., Professor of Botany, 

 University College, Reading, and E. Frankland Armstrong, Ph.D., D.Sc. 

 Communicated by W. Bateson, F.R.S 460 



Some Conditions Influencing Nitrogen Fixation by Aerobic Organisms. By 

 W. B. Bottomley, M.A., Professor of Botany, King's College, London. 

 Communicated by Dr. J. Reynolds Green, F.R.S 466 



'The Intensity of Natural Selection in Man. By Karl Pearson, F.R.S 469 



The Morphology of Trypanosoma simice, sp. nov. By Colonel Sir David Bruce, C.B., 

 F.R.S., A.M.S. ; Majors David Harvey and A. E. Hamerton, D.S.O., R.A.M.C; 

 Dr. J. B. Davey, Nyasaland Medical Staff ; and Lady Bruce, R.R.C. (Scientific 

 Commission of the Royal Society, Nyasaland, 1911 — 12.) (Plate 13) 477 



'The Cultivation of Trypanosoma rhodesi.en.se, Stephens and Fantham. By H. Bayon, 

 M.D., Genoa and Wurzburg, Beit Memorial Research Fellow, Lister Institute. 

 Communicated by Sir Ronald Ross, K.C.B., F.R.S 482 



Further Observations on the Recovery of Trypanosoma gambiense from Tragelaplius 

 spehei on the Islands of Lake Victoria Nyanza. By Dr. H. L. Duke. Com- 

 municated by Sir John Rose Bradford, K.C.M.G., Sec. R.S 483 



No. B 582.— October 11, 1912. 

 ^Studies on the Reductase of Liver and Kidney. — Part I. By David Fraser Harris, 



M.D., D.Sc, F.R.S.E., Professor of Physiology and Histology, and Henry 



Jermain Maude Creighton, M.A., M.Sc, Dr.Sc, Lecturer on Physical 



Chemistry, Dalhousie University, Halifax, N.S. Communicated by Prof. A. J. 



Brown, F.R.S 486 



Croonian Lecture : The Process of Excitation in Nerve and Muscle. By Keith 



Lucas. Communicated by Sir John Bradford, Sec. R.S 495 



The Development of a Parasite of Earth-worms. By John Westray Cropper, M.B., 



M.Sc, Liverpool. Communicated by Sir R. Ross, K.C.B., F.R.S. (Plate 14)... 525 

 Notes on the Polymorphism of Trypanosoma, gambiense in the Blood and its Relation 



to the Exogenous Cycle in Glossina palpalis. By Miss Muriel Robertson. 



Communicated by the Tropical Diseases Committee of the Royal Society 527 



